Signal transmission system for machine tools, inspection machine

Details Signal transmission system for machine tools, inspection machine Signal transmission system for machine tools, inspection machine

1989-04-07

1991-10-15

Will, Thomas B.

Geometrical instruments

Gauge

Coordinate movable probe or machine

33558, 34087011, 340680, 34082558, G01B 503, G08C 1916

Patent

active

050562355

ABSTRACT:
Probes (18A, 18B, 18C) can be interchangeably mounted in the spindle (12) of a machine tool. Each probe has an optical signal transmission system, in which an optical signal from a light emitting diode (24) is transmitted to a receiving photodiode (26). To prevent interference between the different probe signals, each probe modulates the emitted light at a different carrier frequency. The receiver (28) contains electronic bandpass filters to separate out the different carrier frequencies. The signal information is encoded onto the optical signal by phase modulation of the carrier frequency.

REFERENCES:
patent: 3032745 (1962-05-01), Hamer
patent: 3290667 (1966-12-01), Stine
patent: 3582921 (1971-06-01), Krieger
patent: 4145580 (1979-03-01), Hasegawa
patent: 4509266 (1985-04-01), Cusack
patent: 4545106 (1985-10-01), Juengel
patent: 4608714 (1986-08-01), Juengel
patent: 4658509 (1987-04-01), Juengel
patent: 4682118 (1987-07-01), Thiel
patent: 4693110 (1987-09-01), Juengel
patent: 4805314 (1989-02-01), Hayashi et al.
Electronics Letters, vol. 20, No. 23, Nov. 8, 1984, pp. 971-973, Staines, Middlesex, GB.
Georgopoulos et al: "Hybrid IR/RF Transmission System with Common Modulating Circuit", Laser Focus, Mar. 1985, No. 3.

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